In January, Volkswagen rolled out a new, simplified customer review process for its U.S. dealerships that dropped numerical ratings in favor of customer-worded answers that is helping guide dealers to respond to COVID-19 concerns.

Trump, speaking at an event in Maine, complained about duties on American lobsters. "If the European Union doesn't drop that tariff immediately, we're going to put a tariff on their cars, which will be equivalent," he said.

The autonomous vehicle industry contends its cars were programmed to prevent a vastly higher number of potential crash causes, including more complex errors caused by drivers making inadequate or incorrect evasive maneuvers.